Along with the rebuild, all the engine bolts are getting replaced with fresh looking bolts as all the casings will be changed.
BHPian Dhruv Shetty recently shared this with other enthusiasts:
The engine rebuild starts (Around 40k)
After months of waiting and lots of discussions, the rebuild finally started, during the wait for the rebuild, I had a few dreams related to it and second thoughts about switching to slipper clutch. When I received the first batch of photos of the bike on the lift with the engine running and getting washed, I was watching the videos on repeat for quite a while. When the engine was stripped down it revealed lots of hidden damages.
Bike up on the lift and ready for engine removal
Coolant and engine oil drained
Radiator and bend pipe out
The radiator is going to reused for now as it has some life left in it and will be replaced down the line.
Engine down
On the bench ready to be stripped for further inspection
Top cover off
From here all the hidden damages started to show which was sort of expected.
Cylinder head
The cylinder head had taken quite a heavy wear, all the contact surfaces where the camshafts shits and rotates were beyond saving. So now the cylinder head is attached to the shopping cart.
The oil was also entering the combustion chamber through the valves.
Now comes the other half where more surprises came up
This came as a surprise, the crown of the piston did not have much of carbon buildup with all the oil burning and coolant mixing which didn’t show any signs in the oil.
Between the two rings, one can notice the black marks, that is the oil and coolant burning and forming a layer of something and the scratches on the cylinder walls and piston. 
Here is the crankshaft bearing with some nice wear which was causing the crankshaft to move in all directions.
Clutch basket has seen better days
The output shaft which is on its way out and going to be replaced.
The toasty looking insides of the engine
The magnet was badly stuck in place and took 2 hours to come without going down with a fight as it destroyed itself and a tool in the shop and damaged the shaft which it was sitting on, so it did quite alot of damage to come off. 
The only component to survive is the gearbox, rest of them are toast, so it will be 90% new engine.
After opening up the engine, i came to know where my coolant was disappearing without a trace, the area where the coolant pump is, the sealing surface was worn out like the rest of the engine.
Along with the rebuild, all the engine bolts are getting replaced with fresh looking bolts as all the casings will be changed, with a new block and cylinder head with its cover.
After the rebuild, the Brake calipers are getting rebuilt with fresh fluid and swingarm refresh.
In a way i am excited to see and feel how the slipper clutch is going to behave.
Until the next update.
Cheers,
Dhruv Shetty
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